21_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack smoking-accessories Reinforced outside shell made from

Reinforced outside shell made from recycled materials provide the strongest support to date

the SAM 400® assists with whole-room disinfection

Strong UV peaks for increased resin production

and our long-lasting wetting agent

Tray Volume

21_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack smoking-accessories Reinforced outside shell made fromNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition